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throbbing light questions
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Registered User
Join Date: Jan 2001
Location: cambridge, ma
Status:
Offline
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does anybody know if you can control the throbbing
light (brightness & pulse rate) on the front of the G4
MP 500 via software??
(or any mac with the throbbing light for that matter)
also, does it have any functional purpose?
(aside from being cool)
....or keeping you awake at night if
you happen to have the machine in same room
as you sleep... 
[This message has been edited by eddieP (edited 02-05-2001).]
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Junior Member
Join Date: Nov 2000
Location: Goose Creek, SC, USA
Status:
Offline
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I have no idea. It is quite bright though illuminating the room then fading away. I like the power buttons of the Apple's, quite nicely done. My G3(platinum) had a green light that would strobe, I love that.
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Clinically Insane
Join Date: Apr 2000
Status:
Offline
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Comtrol via software? Nope. Firmware controlled I'd say... or ROM or something. Actually its probably hard wired...
Functional purpose, yes. When pulsing it indicates the computer is in a deep sleep mode, as opposed to being either active, or in a higher powered (normal) sleep mode. Deep sleep shuts off everything but RAM, etc... so you can get back to work quickly, but theres nothing else running; no HD, no fans, etc...
Cipher13
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Registered User
Join Date: Jan 2001
Location: cambridge, ma
Status:
Offline
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...well the only reason that i put this out there is b/c
i recently had some "issues" which resulted in the slow
painfull demise of my hard drive and during that time
i noticed that the throbbing was happening at a much
different rate
it went away after re-initializing the drive, however
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ekoelbel
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really? was it a much faster rate, or slower? or maybe not rhythmic?
it seems odd to me....
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Registered User
Join Date: Jan 2001
Location: cambridge, ma
Status:
Offline
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it was odd to me as well...and definitely the prelude
to disaster. the drive crashed not to long afterwards
(i saw it coming though, and was backed up -thankfully)
the light throbbed at a slightly faster rate and a little
choppier -- hopefully it won't happen again but it would be
cool to be able to control it
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Grizzled Veteran
Join Date: Mar 2000
Location: Massachusetts, USA
Status:
Offline
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There is no software controlling the rate at which the light throbs. It is a simple circuit built from resistors and capacitors that builds then releases charge resulting in the fading light. So once the computer enters sleep the circuit is switched from "on" to "sleep" which uses the circuitry to fade.
I am curious about the report of a light throbbing faster before HD failure. This means the circuit was receiveing more power then it should have been since it took less time for the capacitor to charge and discharge. Could be caused by a bad powersupply or bad wiring and power regulation in the building's wiring. To much current could also have been what fried your hard drive, most likely damaging its controller chipsets.
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